whirlpool gas dryer will not start

Whirlpool Gas dryer has been working fine.
Today it will not run. Press the start button & nothing.
Checked door switch,thermal fuse,timer,high limit thermostat.
I wired the motor directly & it runs fine. There is a part attached to the motor I think is a start relay. Took it apart & contacts were burned a little.
Cleaned & put back together but still not working.
I suspect that it is bad. I cannot find that part anywhere.
Does it only come with a new motor?
Any other tips would be appreciated. Maybe I’m missing something?